Optical synthetic aperture imaging telescope array co-phase error detection method based on multi-wavelength phase modulation
A technology of phase modulation and synthetic aperture, which is applied in the field of optical imaging telescopes, can solve the problems of low measurement accuracy of curvature sensors, inability to detect complexity, and inability to solve 2π, etc., and achieve fast calculation speed, high speed, and high real-time effect
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[0039] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0040] The present invention provides a method for detecting the common phase error of an optical synthetic aperture imaging telescope array based on multi-wavelength phase modulation. The object measured in this embodiment is a dual-hole optical synthetic aperture telescope array system composed of two sub-telescopes. The light source is a multi-wavelength output laser 1, and the phase modulation device used is a transmissive liquid crystal piston phase modulator 8. The specific implementation steps are as follows:
[0041] (1) Set the wavelength of the emitted light of the multi-wavelength output laser 1 as λ 1 ;
[0042] (2) Adopt four-step phase shift modulation, take M=4, adjust the transmissive liquid crystal piston phase modulator 8, add phase differences of 0, π / 2, π, 3π / 2 to one sub-mirror in turn, and use them in turn The point spre...
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